21283263

素因数分解:

$3^3\times {\mathrm{53}}^1\times {\mathrm{107}}^1\times {\mathrm{139}}^1$

素因数の和:308

約数の個数: 32

約数和(自身を含む): 32659200

約数和(自身を除く): 11375937

約数列:

[1, 3, 9, 27, 53, 107, 139, 159, 321, 417, 477, 963, 1251, 1431, 2889, 3753, 5671, 7367, 14873, 17013, 22101, 44619, 51039, 66303, 133857, 153117, 198909, 401571, 788269, 2364807, 7094421, 21283263]

約数ペア:

[(1, 21283263), (3, 7094421), (9, 2364807), (27, 788269), (53, 401571), (107, 198909), (139, 153117), (159, 133857), (321, 66303), (417, 51039), (477, 44619), (963, 22101), (1251, 17013), (1431, 14873), (2889, 7367), (3753, 5671)]